Turbocharger/Supercharger Bypass Valve A Position Exceeded Learning Limit
The turbocharger/supercharger bypass valve A reports a position exceeded learning limit condition. Boost recirculation cannot be commanded reliably.
Affected components
- Turbo bypass valve a
- Wiring harness
- Ecm
Common causes
- High likelihood: Mechanism worn at end-stops
- Medium likelihood: Sensor reference drifted
Possible symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.